ASP.NET Required Field Validator not working

Question

Hi all I need a required field validator for my textbox..This is my textbox..

<asp:TextBox ID="txtTimeSlotGroupName" runat="server" AutoPostBack="false" ClientIDMode="Static"></asp:TextBox> <font color="red">*</font> <asp:RequiredFieldValidator ID="RequiredFieldValidator_txtTimeSlotGroupName" runat="server" ControlToValidate="txtTimeSlotGroupName" Display="None" ErrorMessage="Timeslot Group Required!" ForeColor="Red" InitialValue="0" ValidationGroup="TimeSlot"></asp:RequiredFieldValidator>

My button:

<asp:Button ID="btnAddTimeSlots" Text="Add Timeslots" CssClass="button" runat="server" OnClick="btnAddTimeslots_Click" ValidationGroup="TimeSlot" OnClientClick="javascript:shouldsubmit=true;"/>

I am not getting the error message. Any solutions?

Need to put ValidationGroup to txtTimeSlotGroupName :)

zey
– zey

2013-04-25 05:38:16 +00:00
Commented Apr 25, 2013 at 5:38 — zey
– zey, Commented Apr 25, 2013 at 5:38

Amit Singh · Accepted Answer · 2013-04-25 05:35:10Z

You have to define the Validation Group Of your Textbox too....to make it work

 <asp:TextBox ID="txtTimeSlotGroupName" runat="server" AutoPostBack="false" ValidationGroup="TimeSlot" ClientIDMode="Static"></asp:TextBox>

yalinhahs · Accepted Answer · 2013-04-25 05:34:53Z

Remove InitialValue="0" from the RequiredFieldValidator tag, it is not required when you are validating the textbox.

ujell · Accepted Answer · 2014-06-17 11:03:09Z

Even I was facing the same issue. Kindly check if any javascript are present on your page. Irrespective of above make use of Page.Validate() method and if(Page.IsValid) in your code. This will automatically force your validation controls and issue will be solved

CHEGENI · Accepted Answer · 2014-08-08 15:14:39Z

3

If two objects have the same id the required field validator Does not work.

edited Aug 8, 2014 at 15:14

answered Aug 8, 2014 at 12:46

CHEGENI

312 bronze badges

3 Comments

defines Over a year ago

Can you clarify? "Objects" do not have an "id" - do you mean names for variables? If so, from which context? Or, perhaps you mean the "id" attribute of an element? If so, which elements? Do you mean any elements on the page with the same id will break validation? I doubt that, but that's the closest I can come to interpreting this answer. Thank you in advance for any additional detail you can provide!!

Chillin' Over a year ago

Late to the party but CHEGNI means any element on the page. A text box, a required field validator, a buton, a custom validator, ANYTHING. Any two elements that have id="idname". if any two have the same ID then some things can go wrong, especially in javascript.

N Khan Over a year ago

@CHEGENI is right? any solution for this after 6 years

Hema Shetty · Accepted Answer · 2015-04-08 17:21:16Z

You just add ValidationGroup="TimeSlot" in textbox

 <asp:TextBox ID="txtTimeSlotGroupName" runat="server" AutoPostBack="false" ValidationGroup="TimeSlot" ClientIDMode="Static"></asp:TextBox>

AFatBunny · Accepted Answer · 2018-11-06 20:19:20Z

I had this same issue... but none of the above answers were the fix for me...

My problem was that I was missing the Page.isValid in my button press method. Below is my button code and the method called by the button.

Button:

<asp:Button ID="btnBtmSave" runat="server" Text="Save" OnClick="btnSave_Click" BtnGroup="save" TabIndex="18" />

Button method:

protected void btnSave_Click(object sender, EventArgs e) { if (Page.IsValid) { //Logic goes here } }

Aladein · Accepted Answer · 2016-10-25 14:18:17Z

make the same Validation Group Of all your text and Add button and Validation

 ValidationGroup="AAA"

and add the code to your save button:

 If (Page.IsValid) Then YOURSQL.Insert() 'or ur code here' End If

Surendra · Accepted Answer · 2020-07-07 16:46:52Z

In my case, For button, I was using both client side validation i.e onClientClick="return validate()", and ASP.NET Validation i.e Reguired field Validation (ValidationGroup). Hence the Required field validators were not firing.

user26452728 · Accepted Answer · 2024-07-21 08:35:20Z

firstly go to config file and add code after the</system.we>

 <add key="ValidationSettings:UnobtrusiveValidationMode" value="None"/> </appSettings>

esims · Accepted Answer · 2025-01-13 20:01:08Z

In my case it didn't work because the HTML of the container was modified by javascript (jQuery actually).

Some answers mention the use of the ValidationGroup attribute, but I don't think that is relevant to the original question, because it is not a required attribute and it only restricts the buttons that perform validation.

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